Overcome field depletion
The Emery Deep field, a recent development for Agiba Petroleum, started
to experience some depletion, and the reservoir pressure required some
maintenance. As a result, a new water injection well, ED-16 ST, was drilled to
support the northern part of the field. However, the 16,500-bbl/d
[2,623-m3/d] capacity of the available water source wells was not
sufficient to feed the new injector well. Therefore, an additional source of
compatible water was required.
Two solutions were considered to address this issue. The most obvious
solution was to drill another additional water source well. However, drilling
and completing a new well, and installing new flowlines would incur substantial
Another option was to rely on a natural dumpflood. The ED-16 ST well has
access to both the injection and water source (producing) zones of the field.
The producing zone has higher pressure than the injection zone. Therefore, by
perforating both zones, a natural crossflow would occur, providing some
pressure support. However, the pressure difference was found to be inadequate
to provide the flow rate required.
A new approach was required to assist flow and achieve the required